Home / 2,890.40-3,987.96-1,841.60

Finding the Fourth Proportional to 2,890.40, 3,987.96 and 1,841.60

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Solution

The fourth proportional to 2,890.40, 3,987.96 and 1,841.60 is: 2,540.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.40 : 3,987.96 = 1,841.60 : x
  2. Step 2: Convert to fraction form
    2,890.40/3,987.96 = 1,841.60/x
  3. Step 3: Cross multiply
    2,890.40x = 3,987.96 × 1,841.60
  4. Step 4: Simplify right side
    2,890.40x = 7,344,227.14
  5. Step 5: Solve for x
    x = 7,344,227.14/2,890.40
  6. Step 6: Final answer
    x = 2,540.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.